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Table 2 Calculation of effective rainfall, resulting runoff, and time zones from outlet to upstream

From: Hydrological problems of flash floods and the encroachment of wastewater affecting the urban areas in Greater Cairo, Egypt, using remote sensing and GIS techniques

Time zones from outlet to upstream (hours) Area (square kilometer) Effective rainfall (mm) Resulting runoff (cubic meters)
1 41 20 820,000
2 55 20 1,100,000
3 45 20 900,000
4 45 20 900,000
5 32 20 640,000
6 37 20 740,000
Total 255 20 4,800,000